Honeywell 2020 - Manual (Page 36)

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Out of Range and Back into Range with Data Accumulation Mode
On
The image scanner may store a number of symbols (approximately 500 UPC
symbols, others may vary) when out of range and then send them to the base
when back in range. You will not hear a communication error beep in this mode,
but you will hear a short buzz when you pull the trigger if the radio communica-
tion is not working. Once the radio connection is made, the image scanner pro-
duces a series of beeps while the data is being transferred to the base.
Communication Between the Cordless System and the Host
The cordless image scanner provides immediate feedback in the form of a
“good read” indication (a green LED on the image scanner and an audible
beep) after a barcode is scanned correctly and the base has acknowledged
receiving the data. This is possible since the cordless system provides two-way
communication between the image scanner and the base.
When data is scanned, the data is sent to the host system via the base unit.
Confirmation from the host system or the base indicates that the data sent was
received by the host. The cordless image scanner recognizes data acknowl-
edgement (ACK) from the base unit. If it cannot be determined that the data
has been properly sent to the base, the image scanner issues an error indica-
tion. You must then check to see if the scanned data was received by the host
system.
Connecting the Base When Powered by Host
(Keyboard Wedge)
A base can be connected between the keyboard and PC as a “keyboard
wedge,” plugged into the serial port, or connected to a portable data terminal in
wand emulation or non decoded output mode. The following is an example of a
keyboard wedge connection:
1. Turn off power to the terminal/computer.
3) Base sends
data to host
1) Good Read
2) ACK from base